### post module assignment Q 19

Posted:

**Wed Oct 23, 2019 12:34 am**is the answer D? I feel like A, B, C are right because they explain the main photoelectric effect equation showing conservation of energy

Created by Dr. Laurence Lavelle

https://lavelle.chem.ucla.edu/forum/

https://lavelle.chem.ucla.edu/forum/viewtopic.php?f=16&t=48602

Page **1** of **1**

Posted: **Wed Oct 23, 2019 12:34 am**

is the answer D? I feel like A, B, C are right because they explain the main photoelectric effect equation showing conservation of energy

Posted: **Wed Oct 23, 2019 12:55 am**

Yes, the answer is D. The first three are all variations of the energy change between a photon and the electron/metal.

Posted: **Wed Oct 23, 2019 1:35 am**

D does not represent the photoelectric effect. Instead, the equation shows the inverse relationship of frequency and wavelength.

Posted: **Wed Oct 23, 2019 11:11 am**

The answer should be D. None of the other ones is a correct representation of the photoelectric effect.

Posted: **Wed Oct 23, 2019 11:40 am**

It's D because even though we use that equation often while trying to solve photoelectric effect-related problems, it is not an equation we use to describe what is going on in the photoelectric effect. D is the equation we use to find either the frequency or wavelength of a photon, as it is the classical mechanics description of light.